Improvement in the manufacture of india-rubber belts



waited I tant @aient dttjlw.

ALBERT n. 1100K,v or new vron1 ,-.N. Y.

Letters Patent No.v102,268, dated Ap'rtll26, 1870.

The Schedule referred-to in these Letters Patent and making part of the same.-

Be it known that I, ALBERT' H.v HooK, of the city, county, and State of New York, have invented a new improvement` in thev Manufacture of India-Rubber Belts, with the View of increasing the strength of the belt, and that the following is a clear and exact description thereof', reference being. taken to the annexed drawings, of which- Figure 1 is a view of au ordinary three-ply belt as itis usually'v made.

lFigure 2, a cross-section thereof. Figure 3 is a view of my improved belt.

In all the gures the warp of the cloth is shown in black lines and thelling in red.

Rubber b elts are now being made of cloth in which the warp is at right angle with the lling. This cloth is covered with rubber in calenders, and cut into strips parallel to the threads of the warp. The out-side strip is double thewidth of the required belt, and 'is folded up in a manner as shown in Iig. 2 in cross-section, and for a three-ply belt one strip, of the width of the belt, and cut also in the direction of the warp, is placed inside the-folds of the outer strip, and the whole isthen caused to adhere together.

. For a four-ply belt two strips are placedbetween thefolds of the irstvstnp, and so on. Alter theybelt is so formed it is placed in a heater and cured.

It is self-evident that a fabric of this description depends for its strength altogether upon the warp, which runs in the direction of the belt, while the filling, which runs at right angle tothe said warp serves merely to hold the various threads of the warp together.

The object of my improvement is to cause the threads of the filling to sustain a certain portion of the strain to which the belt is subjected, andthis I accomplish by weaving the cloth of which the saidv belt is composed `in a diagonal loom, or by stretching cloth woven in the ordinary manner with' square filling, diagonally,4 so that the filling shall cross the warp at an angle of forty-five degrees, more or less, as shown in fig. 3. This cloth is then covered with rubber and cut into strips parallel to the warp and folded in the same manner as above' described. v

It will be seen at once that the filling in the two flaps of the outer strips must run at right angles to the lliug in the front part of the said outer strip, and care -must be taken to place all the inner strips,l if there are'auy, also in` reversed directions, causing their fillings to lcross each other at right angles. A belt so made cannot tear in two without tearing the warp and all the strands of the filling simultaneously.

' Having now described my invention,

Whatl claim as'uew, and desire to s ecuie by Let' ters Patent, is-ff' l j y Arubber belt composed of cloth, the filling of which crosses the warp diagonally."

Witnesses:

O, A. BROWN,4 R. A. ADAMS. f

ALBERT H. HOOK. 

